正确答案: B

Ⅱ+Ⅲ

题目：废气锅炉出口排烟温度t2不应低于露点，排气露点与（）有关。Ⅰ.废气锅炉蒸汽工作压力；Ⅱ.燃油的含硫量；Ⅲ.排气中的水蒸气分压

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学习资料的答案和解析：

[单选题]在重新组装回油孔调节式喷油泵时，为了保证齿条刻度指示的零位与柱塞套筒的实际零位（油泵柱塞直槽对准套筒上的回油孔）一致，生产厂家在（）之间做了对中记号，轮机员必须将两者对齐。

齿条和齿套

[单选题]船轴表面裂纹可采用（）进行无损检测。Ⅰ.着色探伤；Ⅱ.煤油-白粉；Ⅲ.磁粉探伤；Ⅳ.超声波探伤；Ⅴ.X射线探伤。

Ⅰ＋Ⅲ

[单选题]It is necessary to remove （） from the cooling spaces.

scale

[单选题]The cleaned heated oil, after passing through the centrifuges, is to be pumped to a （）.

service tank

[单选题]Which of the following can be obtained by means of an indicator card?（）

the peak pressure in a cylinder

[单选题]With the crank in position in the engine, some measurements can be taken by a special bridge gauge and （）.

a feeler gauge